22771044 has 96 divisors (see below), whose sum is σ = 63369600. Its totient is φ = 7138368.

The previous prime is 22771043. The next prime is 22771057. The reversal of 22771044 is 44017722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 22770999 and 22771017.

It is not an unprimeable number, because it can be changed into a prime (22771043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166144 + ... + 166280.

It is an arithmetic number, because the mean of its divisors is an integer number (660100).

Almost surely, 2^22771044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22771044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31684800).

22771044 is an abundant number, since it is smaller than the sum of its proper divisors (40598556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22771044 is a wasteful number, since it uses less digits than its factorization.

22771044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 22771044 is about 4771.9015077849. The cubic root of 22771044 is about 283.4398965557.

Adding to 22771044 its reverse (44017722), we get a palindrome (66788766).

It can be divided in two parts, 2277 and 1044, that added together give a triangular number (3321 = T₈₁).

The spelling of 22771044 in words is "twenty-two million, seven hundred seventy-one thousand, forty-four".